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画出下列图形的三视图.
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画出下面实物的三视图
画出下列立体图形的三视图.
画出下面实物的三视图.图9-55
画出下图的三视图
关于三视图的说法正确的是
机件向投影面投影所得到的图形称为三视图
机件向水平面投影所得到的图形称为三视图
机件向垂直面投影所得到的图形称为三视图
机件向三个投影面体系中的投合称为三视图
画出下面立体图形的三视图.
⑴先化简再求值⑵画出下面实物的三视图
已知几何体的三视图如下用斜二测画法画出它的直观图直接画出图形尺寸不作要求.
按规定尺寸作出下面图形的三视图
三视图是观测者从三个不同角度观察同一个空间几何体而画出的图形
平面
上面
左面
正面
画出下列空间几何体的三视图.
画出下面立体图形的三视图.
画出下面立体图形的三视图.
绘图题画出下列长方体三视图
是仅画出机件断面的图形
剖视图
全剖视图
三视图
剖面图
画出下列立体图形的三视图
画出下列立体图形的三视图
说出下列三视图所表示的几何体
画出下面实物的三视图
作出下面立体图形的三视图
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某实验小组用细菌甲异养生物作为材料来探究不同条件下种群增长的特点设计了三个实验组每组接种相同数量的细菌甲后进行培养培养过程中定时更新培养基三组的更新时间间隔分别为3h10h23h得到abc三条种群增长曲线如图所示.下列叙述错误的是
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在△ABC中内角ABC的对边分别是abc满足a2+b2﹣c2tanB=b2+c2﹣a2. I求角A Ⅱ△ABC的面积为求的值.
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动物受到惊吓刺激时兴奋经过反射弧中的传出神经作用于肾上腺髓质使其分泌肾上腺素兴奋还通过传出神经作用于心脏.下列相关叙述错误的是
已知函数a>0的最小值为2则实数a=
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用体外实验的方法可合成多肽链.已知苯丙氨酸的密码子是UUU若要在体外合成同位素标记的多肽链所需的材料组合是 ①同位素标记的tRNA ②蛋白质合成所需的酶 ③同位素标记的苯丙氨酸 ④人工合成的多聚尿嘧啶核苷酸 ⑤除去了DNA和mRNA的细胞裂解液
基因工程中可以通过PCR技术扩增目的基因.回答下列问题.1基因工程中所用的目的基因可以人工合成也可以从基因文库中获得.基因文库包括和.2生物体细胞内的DNA复制开始时解开DNA双链的酶是.在体外利用PCR技术扩增目的基因时使反应体系中的模板DNA解链为单链的条件是.上述两个解链过程的共同点是破坏了DNA双链分子中的.3目前在PCR反应中使用Taq酶而不使用大肠杆菌DNA聚合酶的主要原因是.
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已知过点0﹣1与曲线x>0相切的直线有且仅有两条则实数a的取值范围是.
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用a1a2…a10表示某培训班10名学员的成绩其成绩依次为85689575889290807887.执行如图所示的程序框图若分别输入a1的10个值则输出的的值为
甲乙是严重危害某二倍体观赏植物的病害.研究者先分别获得抗甲乙的转基因植株再将二者杂交后得到F1结合单倍体育种技术培育出同时抗甲乙的植物新品种.以下对相关操作及结果的叙述错误的是
已知实数xy满足则的取值范围为.
15分Theadobedwellings土坯房61buildbythePuebloIndiansoftheAmericanSouthwestareadmiredbyeven62mostmodernofarchitectsandengineers.Inadditiontotheirsimplebeautywhatmakestheadobedwellingsadmirableistheir63abletoairconditionahousewithout64useelectricequipment.Wallsmadeofadobetakeintheheatfromthesunonhotdaysandgiveoutthatheat65slowduringcoolnightsthuswarningthehouse.Whenanewdaybreaksthewallshavegivenuptheirheatandarenowcoldenough66coolthehouseduringthehotday67thesametimetheywarmupagainforthenightThiscycle68godayafterdayThewallswarmupduringthedayandcooloffduringthenightandthusalwaysatimelyoffset抵消fortheoutsidetemperatures.As69naturearchitectsthePuebloIndiansfiguredoutexactly70thicktheadobewallsneededtobetomakethecycleworkonmostdays. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70.
10分假如英语课上老师要求同桌之间交换修改作文请你修改你同桌的以下作文.文中共有10处错误每句中最多有两处.错误涉及单词的增加删除或修改. 增加在缺词处加一个漏词符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错词下面划一横线并在该词下面写出修改后的词. 注意1每处错误及其修改均仅限一词; 2只允许修改10处多者从第11处起不计分. OnedaylittleTonywenttoashoppingcenterwithhisparent.Itwasverycrowded.Tonysawatoyonashopwindow.Helikeditsoverymuchthathequicklywalkedintotheshop.Afterlooksatthetoyforsometimeheturnedaroundandfoundwherehisparentsweremissing.Tonywasscaredandbeguntocry.Awomansawhimcryingandtellinghimtowaitoutsideashop.Fiveminuteslater.Tonysawparents.MomsaidHownicetoseeyouagain!DadandIwereterribleworried.Tonypromisedherthatthiswouldneverhappenagain.
30分Wheredoyougowhenyouwanttolearnsomething?Afriend?Atutor?Theseareall41acesoflearning.Butitmaywellbethatthelearningyoureallywant42somewhereelseinstead.Ihadthe43ofseeingthisfirsthandona44. Mydaughterplaysonarecreationalsoccerteam.Theydidverywellthisseasonandso45atournamentwhichnormallywasonlyformoreskilledclubteams.Thisledtosome46experiencesonSaturdayastheyplayedagainstteams47trained.Throughthefirsttwogamesher48didnotgetonseriousshotongoal.AsapparentI49seeingmydaughterplayingherbest50stilldefeated. ITseemedthatsomethingclickedwiththe51betweenSaturdayandSunday.Whenthey52fortheirSundaygametheywere53different.Theyhadbegunintegrate融合thekindsofplayandteamworktheyhad54thedaybeforeintotheir55.Theyplayedaggressivelyand56scoredagoal. It57methatplayingagainsttheotherteamwasagreat58momentforallthegirlsontheteam.Ithinkitisageneralprinciple.59isthebestteacher.Thelessonstheymaynotbe60whattheywouldhavegotteninschool.Butarecertainlymorepersonalandmeaningfulbecausetheyhadtoworkthemoutontheirown. 41.A.public B.traditional C.official D.special 42.A.passes B.works C.lies D.ends 43.A.dream B.idea C.habit D.chance 44.A.trip B.holiday C.weekend D.square 45.A.won B.entered C.organized D.watched 46.A.painful B.strange C.common D.practical 47.A.less B.poorly C.newly D.better 48.A.fans B.tutors C.class D.team 49.A.imagined B.hated C.avoided D.missed 50.A.if B.or C.but D.as 51.A.girls B.parents C.coaches D.viewers 52.A.dressed B.showedup C.madeup D.planned 53.A.slightly B.hardly C.basically D.completely 54.A.seen B.known C.heard D.read 55.A.styles B.training C.game D.rules 56.A.even B.still C.seldom D.again 57.A.confused B.struck C.reminded D.warned 58.A.touching B.thinking C.encouraging D.learning 59.A.Experience B.Independence C.Curiosity D.Interest 60.A.harmfulto B.mixedwith C.differentfrom D.appliedto.
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